Terahertz Radiation Generated by Laser Induced Plasma in Photoconductive Antenna

Author

Lei Hou ; Suguo Chen ; Zhijin Yan ; Wei Shi

Author_Institution

Appl. Phys. Dept., Xi´an Univ. of Technol., Xi´an, China

Volume

49

Issue

9

fYear

2013

fDate

Sept. 2013

Firstpage

785

Lastpage

789

Abstract

To theoretically analyze the spectral characteristics of terahertz (THz) electromagnetic radiation generated by photoconductive antennas, the paper proposed a model by considering laser induced plasma in photoconductive antenna. At a bias voltage, plasma oscillation generates Langmuir wave that propagates in the inhomogeneous plasma in the direction of density gradient, and is converted to THz radiation after a converse zone. The influence factors of the bandwidth and peak frequency are analyzed by the model and testified by experiment.

Keywords

antennas; inhomogeneous media; plasma Langmuir waves; plasma density; plasma devices; plasma production by laser; plasma sheaths; terahertz wave generation; Langmuir wave; THz radiation; converse zone; density gradient; inhomogeneous plasma; laser induced plasma; photoconductive antenna; sheath; spectral characteristics; Antennas; Educational institutions; Electric fields; Electromagnetic scattering; Oscillators; Plasma density; Langmuir wave; photoconductive antenna; plasma; sheath;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2013.2275019

Filename

6570530